I fear I may have become an instant alcoholic after becoming so revolted by what I saw at a Showtime screening Tuesday night that I tried to give myself a blackout so that I could forever wipe it all from my mind.

And I’m not alone in my need to get drunk. My colleague Robert Rorke, who also attended the event, was so grossed out, he moaned, “Help! It’s like living inside someone’s underpants!”

What had us so repulsed? The upcoming series “Shameless,” starring William H. Macy, which has been adapted from a hit British series by Hollywood royalty. Yes, we’re talking quality, John Wells of “ER,” “The West Wing,” “Southland” and “Third Watch.”

Macy plays a single father of five and an alcoholic who gets so (excuse the British expression) pissed every night that he urinates all over himself before passing out on the kitchen floor. He is verbally abusive to his family, which lives in filth. The teen kids have random sex, and all that dad contributes to the family fund — according to the oldest daughter — are dental dams for her forays into oral sex.

The boys, on the other hand (no pun intended), get oral sex from the neighbor’s slutty daughter who slides under the table while the girl’s insane mother (Joan Cusack) stands there, oblivious.

To satisfy the pedophiles in the audience, one teen boy has sex with his male Muslim boss — because, maybe in the world of LA hacks, pedophilia is as much fun as racism and alcoholism.

I’ve seen the original Brit version, and it’s a smart, clever, social satire. Too bad it spoiled in transit.

Luckily, the other new series screened, “Episodes,” starring Matt LaBlanc, was not just funny, but bizarrely seemed to make fun of the whole idea of “Shameless.”

It is a series about (I swear) a hit British TV show that gets wrecked by Hollywood hacks who make an American version of it.

LeBlanc — who plays himself — is, of course, perfect as himself.

But, hey — given that it’s Hollywood, the surprise is that they didn’t get Zac Efron to play Matt LeBlanc.